Echinoderm Flashcards

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1
Q

Echinoderm

A

a marine invertebrate

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2
Q

Endoskeleton

A

provide rigidity and protection

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3
Q

Pedicellariae

A

small wrench- or claw-shaped appendage with movable jaws

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4
Q

Madreporite

A

essential part of the circulation system

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5
Q

Radial canal

A

one of the numerous minute canals lined with choanocytes

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6
Q

Ring canal

A

the circular water tube that surrounds the esophagus

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7
Q

Arm / Ray

A

part of the body opposite the mouth

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8
Q

Radial Symmetry

A

five equal segments radiating from a central body

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9
Q

Bilateral Symmetry

A

the property of being divisible into symmetrical halves on either side of a unique plane

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10
Q

Water Vascular System

A

hydraulic system used by echinoderms

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11
Q

Ambulacral Groove

A

extends from the mouth to the end of each ray or arm

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12
Q

Gonads

A

sexual reproductive glands

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13
Q

Central Disc

A

five or more feathery arms radiating from a central disk

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14
Q

Tube Feet

A

small active tubular projections on the oral face of an echinoderm

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15
Q

External Fertilization

A

fertilization of eggs by spermatozoa

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16
Q

Regeneration

A

remaking of tissues

17
Q

Sea star

A

Common usage frequently finds these names being also applied to ophiuroids

18
Q

Brittle star

A

They crawl across the sea floor using their flexible arms for locomotion

19
Q

Echinoderm

A

a marine invertebrate

20
Q

Gonads

A

sexual reproductive glands

21
Q

Ampullae

A

important part of the water vascular system

22
Q

Ossicles

A

a very small bone

23
Q

radial symmetry

A

five equal segments radiating from a central body

24
Q

Ring canal

A

the circular water tube that surrounds the esophagus

25
Q

Central Disc

A

five or more feathery arms radiating from a central disk

26
Q

Pedicellariae

A

small wrench- or claw-shaped appendage with movable jaws

27
Q

Water Vascular System

A

hydraulic system used by echinoderms

28
Q

Tube Feet

A

what they breathe through

29
Q

Endoskeleton

A

provide rigidity and protection